Strong Superconductivity with Local Jahn-Teller Phonons in C60 Solids

J. E. Han, O. Gunnarsson, and V. H. Crespi
Phys. Rev. Lett. 90, 167006 – Published 25 April 2003

Abstract

We analyze fulleride superconductivity at experimental doping levels, treating the electron-electron and electron-phonon interactions on an equal footing, and demonstrate that the Jahn-Teller phonons create a local (intramolecular) pairing which is surprisingly resistant to the Coulomb repulsion, despite the weakness of retardation in these low-bandwidth systems. The requirement for coherence throughout the solid then yields a very strong doping dependence to Tc, one consistent with experiment and much stronger than expected from standard Eliashberg theory.

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  • Received 6 August 2002

DOI:https://doi.org/10.1103/PhysRevLett.90.167006

©2003 American Physical Society

Authors & Affiliations

J. E. Han1, O. Gunnarsson2, and V. H. Crespi1

  • 1Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802-6300, USA
  • 2Max-Planck-Institut für Festkörperforschung, D-70506 Stuttgart, Germany

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Issue

Vol. 90, Iss. 16 — 25 April 2003

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